Malicious PDF — malware analysis report

Static analysis result for SHA-256 99664caef4a23230…

MALICIOUS

PDF

40.6 KB Created: 2020-08-23 17:08:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 936e906c5518652049d5a0cee4593ee5 SHA-1: f4fcf7e70da9362a9794cf4f991223f9171276df SHA-256: 99664caef4a23230e7ba3d42ee1902f3af77f21b61296139ee02a0ce9348538a
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The embedded URL and the document body text both point to a lure related to '1st grade worksheets free printables'. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content. The presence of numerous Shopify links suggests an attempt to blend malicious links with seemingly benign ones.

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=1st+grade+worksheets+free+printables
    • http://files.babybegreendiaperservice.com/uploads/1/3/0/8/130873820/vurajopefupal.pdf
    • https://cdn.shopify.com/s/files/1/0432/4743/5940/files/79663717079.pdf
    • https://cdn.shopify.com/s/files/1/0438/2654/4797/files/atkins_induction.pdf
    • https://cdn.shopify.com/s/files/1/0428/7479/8247/files/98319078564.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/tikomotovenegekowixobu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/simple_decision_making_matrix_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/9131/9200/files/25532150084.pdf
    • https://cdn.shopify.com/s/files/1/0439/1731/2168/files/sufozosukulupuxomowotur.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4189/files/vixilapemovamono.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/65711543684.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/begej.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pizegavegip.pdf
    • https://cdn.shopify.com/s/files/1/0436/2534/9273/files/bharat_nu_bandharan_book_2020.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bab.bin
b31bf8026d25812dfab84c097156d5ac66a5fb676bb4196580afea5d690f2581		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAB 5556 bytes
font_01_sfnt_off00006e9c.bin
54648d45b4f2f13c4a52085363b0c37f219ed6cf032e50c00d810fc067188b29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9C 11604 bytes

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